height,weight = eval(input("请输入身高（米）和体重（公斤）[逗号隔开]："))
bmi = weight / pow(height,2)
print("BMI 数值为:{:.2f}".format(bmi))
who,nat = "",""
if bmi <18.5:
    who,nat = "偏瘦","偏瘦"
elif 18.5 <= bmi <24:
    who, nat = "正常", "正常"
elif 24 <= bmi <25:
    who, nat = "正常","偏胖"
elif 25 <= bmi <28:
    who, nat = "偏胖","偏胖"
elif 28 <= bmi <30:
    who, nat = "偏胖","肥胖"
else:
    who, nat = "肥胖","肥胖"
print("BMI指标为：国际'{0}', 国内'{1}'".format(who,nat))
